Transcript for New Details Suggest LAX Shooting Suspect May Have Targeted the TSA

Thank you so much. Now to los angeles and the news on the airport shooter. Tonight there are urgent calls for more security at l.A.X. And airports across the country as investigators are studying a shadowy subculture and a disturbed young man. Reporter: The fbi is convinced ciancia was targeting t tsa agents but they don't know why. We don't understand what his motives might have been. Reporter: The trouble is they couldn't even ask him. He's still unconscious with a gone shot wound to the head. Today the fbi combed through his apartment for clues and combed through his travel records to see if he ever had a run in with airport security. The last time he traveled abroad was 2006 when he took a trip to japan. Today his family issued their first public statement. We like most americans are shocked and numbed by the tragic events of last friday. Reporter: But offered no clues what could have prompted his spree. The tsa has a thankless job, enforcing procedures we all tolerate through gritted teeth. Who else wants a job groping men, women and children all day. Reporter: The agency embodies a federal government that's too invasive, corrupt and incompetent. Today the u.S. Attorney general took strong exception. No feelings about the government can possibly justify those kinds of actions. Reporter: In other words, it's no excuse for murder. David wright, abc news, l.A.X.

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